HardLabs

GaussSpeedway

mcbridejc·GaussSpeedway

GaussSpeedway PCB layout, top view — open source STM32 board by mcbridejc

About the GaussSpeedway PCB

GaussSpeedway is an open source STM32 PCB design by mcbridejc, published on GitHub. It is a 4-layer board measuring 212.5 × 152.5 mm, with 39 components from 12 distinct parts.

Its main chip is the STM32F051C6T7, from the STM32 family. Other key parts include the MCP1754ST-3302E/CB and ZXBM5210-SP-13. By type, the board carries 14 capacitors, 12 resistors, 5 ICs, 3 transformers, 3 inductors and 2 connectors.

From the project

PCB design for the Gauss Speedway. Designed in Kicad 6.

PCB design for the Gauss Speedway. Designed in Kicad 6.

Firmware: https://github.com/mcbridejc/speedway-controller

The board is a 4-layer board. I typically order it in black soldermask, although this is of course not necessary. I also typically do 1oz inner copper (thinner copper is typically the default) in order to get the trace resistance down.

The holes in the corners are designed to accomodate M3 screws for mounting. The PCB mounts into a 3D printable frame, which has holes to accomodate M3 threaded heat inserts. You can also get by just putting four stand-offs on the corners.

GaussSpeedway, from the project README
From the project README

Main components on the GaussSpeedway

STM32F051C6T7MCP1754ST-3302E/CBZXBM5210-SP-13

GaussSpeedway bill of materials (BOM)

39 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F051C6T7
STM32F051C6Tx
U1
1
MCP1754ST-3302E/CB
MCP1754S-3302xCB
U2
3
ZXBM5210-SP-13
ZXBM5210-SP
U3, U4, U5
1
RASM722BK
Barrel_Jack_Switch
J1
1
S8B-PH-SM4-TB(LF)(SN)
JST PH
J2
2
LinearTouch4
T1, T3
1
Conn_01x01
T2
3
SRR1260A-680M
68u
L1, L2, L3
4
CL10B224KA8NNNC
0.22uF
C1, C4, C5, C7
6
CL21A106KAYNNNG
10uF
C2, C3, C6, C8, C9, C10
4
CL10B473KB8WPNC
47nF
C11, C12, C13, C14
12
AC0603JR-101KL
1k
R1, R2, R3, R4, R5, R6, R7, R8 +4

GaussSpeedway design files

The KiCad project lives in the mcbridejc/GaussSpeedway repository on GitHub; these links point at the commit this page was built from.

GaussSpeedway: common questions

What microcontroller does the GaussSpeedway use?

The GaussSpeedway is built around the STM32F051C6T7, from the STM32 family.

How big is the GaussSpeedway PCB?

The GaussSpeedway measures 212.5 × 152.5 mm, has 4 copper layers and is 4.69 mm thick.

How many components are on the GaussSpeedway?

39 components, from 12 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the GaussSpeedway design files?

From the mcbridejc/GaussSpeedway repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the GaussSpeedway design in my own project?

The repository has no license, so all rights stay with mcbridejc. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the GaussSpeedway without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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